Focus and blur styling (via JS) for the install screen language selector. Props jorbin. See #28577
Built from https://develop.svn.wordpress.org/trunk@29020


git-svn-id: http://core.svn.wordpress.org/trunk@28808 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Narrower layout and loading spinner for the install screen language selector. See #28577
Built from https://develop.svn.wordpress.org/trunk@29021


git-svn-id: http://core.svn.wordpress.org/trunk@28809 1a063a9b-81f0-0310-95a4-ce76da25c4cd